JP2008301329A - Wireless communication system, sim card, mobile communication terminal, and data guarantee method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a loss of the stored data due to physical breakage of a secure memory card such as a SIM card. <P>SOLUTION: A host part 8 executes card authentication of a memory card 9. When the authentication is OK, update data of the memory card 9 is transmitted by security communication so as to execute data update. Then, the host part 8 outputs a request for mirror update of card data to a base-station server 5. When access is allowed, the card data is transmitted to the base-station server 5 via the host part 8 so as to execute mirror update of the card data. When the mirror update of the card data is finished, the base-station server 5 sends a finish confirmation replay to the host part 8 and data backup processing is finished. In this way, data of the memory card 9 is subjected to mirror update by the base-station server 5 so as to prevent a loss of the stored data. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data backup technique in a memory card, and more particularly to a technique that is effective for data assurance such as a SIM (Subscriber Identity Module) card.

  In recent years, as mobile phones and mobile devices have been reduced in size and increased in density, removable memory cards mounted thereon have also been reduced in size, thickness, and density.

  As one of this type of memory card, for example, a SIM card is widely used for mobile phones. Various data such as a unique number called IMSI (International Mobile Subscriber Identity) and a mobile phone number are registered in the SIM card.

  The cellular phone can be used by inserting a SIM card into the slot of the cellular phone. In addition, by inserting this SIM card into another mobile phone, not only can it be used with other types of mobile phones, but a plurality of phone numbers can be switched and used with one mobile phone.

  However, the present inventors have found that the data storage technology using the SIM card as described above has the following problems.

  Although the SIM card contains important information, no measures such as increasing physical strength are taken. If bending or twisting due to a large external force is applied, the SIM card may be destroyed. There is.

  When the SIM card is destroyed, the SIM card can be dealt with by replacement or the like, but all the data stored in the SIM card is lost and the convenience of the user is impaired. There is.

  An object of the present invention is to provide a technique capable of preventing loss of stored data due to physical destruction in a secure memory card such as a SIM card.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  The present invention relates to a SIM card that stores data including data for determining whether or not to use wireless communication, high-frequency power amplification that outputs a high-frequency signal for wireless communication, and RF that performs signal processing on a signal received by wireless communication. A communication unit, a SIM card, and a mobile communication terminal having a host unit that controls the RF communication unit, and a radio communication from the mobile terminal that receives radio waves or transmits radio waves to the mobile communication terminal A plurality of base stations that secure radio communication lines with the mobile communication terminals in the middle, a radio network control unit that performs integrated control by collecting radio waves transmitted and received by the base stations, and responds to requests from the mobile communication terminals A base station server that executes mirror update and restoration of data stored in the SIM card, and the base station server is stored in each SIM card. And a data storage unit for a mirror update over data, when the data of the SIM card is new stored, or updated, is to mirror updates the data of the SIM card in the data storage unit.

  Further, according to the present invention, when the host unit stores data in the SIM card, the host unit requests an update request for requesting mirror update of data to the base station server, and transmits the data to be mirror updated to the base station server. The base station server mirror-updates the data transmitted from the host unit to the data storage unit when requested by the host unit.

  Further, according to the present invention, the host unit determines that the memory card needs to be restored when a new memory card is installed, and sends a restore request for requesting data restoration of the used memory card to the base station. The mirror update data sent from the base station server to the server is stored in a new memory card, and the base station server stores the corresponding data stored in the data storage unit when requested by the host unit. The mirror update data of the memory card is transmitted to the host unit.

  Furthermore, the present invention is provided with a memory card that includes a nonvolatile semiconductor memory that stores data and a controller that controls the operation of the nonvolatile semiconductor memory, and a secure unit that performs secure communication. A SIM card including a SIM card adapter, to which a controller is connected to an external power supply terminal to which an external power supply voltage is supplied and a read interface terminal used when reading an ID number from the outside. When the card becomes inoperable, it operates independently from the controller by supplying power supply voltage via the external power supply terminal, and reads the memory card ID number via the read interface terminal. It has a possible ID control storage.

  Moreover, the outline | summary of the other invention of this application is shown briefly.

  The present invention relates to a SIM card in which data including data for determining whether or not to use wireless communication is stored, high-frequency power amplification that outputs a high-frequency signal for wireless communication, and RF that performs signal processing on a signal received by wireless communication. A mobile communication terminal that performs wireless communication including a communication unit, a SIM card, and a host unit that controls the RF communication unit, and transmits radio waves from the mobile communication terminal or transmits radio waves to the mobile communication terminal A plurality of base stations that secure a wireless communication line with a mobile communication terminal in communication, a wireless network control unit that performs integrated control by collecting radio waves transmitted and received by the base station, and a mobile communication terminal A method for guaranteeing data by a wireless communication system including a base station server that performs mirror update and restoration of data stored in a SIM card in response to a request. When the SIM card data update is completed, wireless communication with the base station server is performed, and the host unit requests mirror update of the update data stored in the SIM card. The data stored in the SIM card transmitted from the host unit in response to the mirror update to the data storage unit, and the data stored in the SIM card is backed up.

  Further, according to the present invention, the host unit performs card authentication when a memory card attached to the SIM card is inserted, and when the memory card does not match, the memory card needs to be restored. The base station server requesting the base station server to transmit the backed up data, the base station server transmitting the backed up data backed up to the data storage unit in response to the request, and the host unit And writing the restore data transmitted from the station server into the memory card.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  (1) Even if the SIM card is broken due to physical destruction or the like, loss of data stored in the SIM card can be prevented.

  (2) Since it is possible to arbitrarily select a communication line route for backup or restoration, it is possible to improve data communication speed, communication quality, and capability.

  (3) Access restriction of the SIM card can be immediately performed by another communication terminal, and data protection of the SIM card can be more reliably performed.

  (4) According to the above (1) to (3), the reliability of the wireless communication system configured using the SIM card can be greatly improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

(Embodiment 1)
1 is an explanatory diagram showing a configuration example of a wireless communication system according to Embodiment 1 of the present invention, and FIG. 2 is a configuration example of a memory card and a SIM card adapter provided in a SIM card in the wireless communication system of FIG. FIG. 3 is a flowchart illustrating an example of data backup processing in the wireless communication system of FIG. 1, and FIG. 4 is an explanatory diagram illustrating a data communication path of the wireless communication system in the data backup processing of FIG. 5 is a flowchart showing data restoration processing in the wireless communication system of FIG. 1, FIG. 6 is an explanatory diagram showing data communication paths of the wireless communication system in the restoration processing of FIG. 5, and FIG. Description showing an example of storing new data rewritten to a memory card in a communication system in a base station server FIG 8 is an explanatory diagram showing a file history management example of the base station server in the wireless communication system of FIG.

  In the first embodiment, the wireless communication system 1 includes a mobile phone 2, a base station 3, a wireless network control device 4, and a base station server 5, as shown in FIG.

  The mobile phone 2 is a mobile communication terminal, and includes a SIM card 6, an RF communication unit 7, and a host unit 8. The SIM card 6 is used when a mobile phone is used, and information for recognizing individual mobile phone numbers is registered.

  The SIM card 6 includes a removable type memory card 9 and a SIM card adapter 10. The memory card 9 stores various data such as multimedia contents such as registration information such as the IMSI number and the aforementioned mobile phone number, telephone book data, and music data.

  The SIM card adapter 10 is provided with a secure unit 11 composed of a secure IC (Integral Circuit) that performs secure communication, and a memory card 9 is mounted via a memory card connector provided in the SIM card adapter 10.

  In addition, although the SIM card 6 showed the example comprised from the removable type memory card 9 and the SIM card adapter 10, the memory card and the secure IC may be integrated.

  The RF communication unit 7 performs high-frequency power amplification for outputting a high-frequency signal for performing wireless communication via the antenna, signal processing for transmitting a signal received from the antenna by wireless communication to the host unit, and the like. The host unit 8 manages all the controls in the mobile phone 2. The host unit 8 includes a processor unit 8a, a memory 8b, an input unit 8c, an output unit 8d, a display unit 8e, a power supply circuit unit 8f, and a memory card interface (I / F) 8g.

  The processor unit 8a includes, for example, a baseband processor and an application processor. The baseband processor executes a real-time OS and executes a baseband protocol stack. The application processor controls the application.

  The memory 8b stores data used for the processor unit 8a. The input unit 8c includes, for example, a numeric keypad input unit, and various information such as a telephone number is input. The output unit 8d includes a speaker, an earphone jack, and the like. The display unit 8e is composed of a liquid crystal display, for example, and displays various information and images.

  The power supply circuit unit 8f generates an internal power supply voltage supplied from the processor unit 8a and the like. The card interface 8g is an interface for communicating with the SIM card 6. The card interface 8g uses a communication protocol such as an ISO 7816 interface when communicating with the secure unit 11, and directly communicates with the memory card 9 without using the secure unit 11, for example, a USB interface or A communication protocol such as a memory card interface is used.

  The base station 3 is provided for each arbitrary area, and transmits or receives radio waves transmitted from the mobile phone 2 to secure a communication line with the mobile phone 2 in communication. The radio network controller 4 aggregates radio waves transmitted and received by the base station 3 and integrates with the base station server 5.

  The base station server 5 includes a server control device 5a and a hard disk device 5b, and the server control device 5a controls the hard disk device 5b. The hard disk device 5b serving as a data storage unit is a storage device that reads and writes various information based on the control of the server control device 5a.

  The base station server 5 responds in response to a request from the mobile phone 2 and executes a mirror update of the data stored in the memory card 9 or a restoration of the data.

  When the data in the memory card 9 is updated (for example, addition, change, deletion, etc. of the address book), the updated data is sent to the base station 3 through the RF communication unit 7 by wireless communication via the secure unit 11, Data similar to the card data is mirror-updated from the base station 3 to the base station server 5 via the radio network controller 4.

  The memory card 9 is provided with an authentication method as a trustet device (apparatus guaranteed by device authentication) for enabling individual identification, or an ID (recognition number) of a secure card, on the base station server 5 side. Assigns a card data area corresponding to the device authentication of the memory card 9.

  As described above, the data of the memory card 9 is completely linked with the base station server 5, so that complete backup and restoration can be performed, and remarkably high reliability can be guaranteed for the memory card 9. .

  Compared with registration information such as IMSI numbers and mobile phone numbers, phone book data stored for each mobile phone user and user data stored for each user such as multimedia contents such as music data may have a large amount of data. is there.

  Backing up and restoring these data is very beneficial for mobile phone users, which increases the safe retention of data.

  FIG. 2 is a block diagram illustrating a configuration example of the memory card 9 and the SIM card adapter 10 provided in the SIM card 6.

  As shown in the figure, the memory card 9 includes a memory 9a made of a non-volatile semiconductor memory exemplified by a flash memory, and a controller 9b for controlling the operation of the memory 9a.

  The SIM card adapter 10 includes a memory card connector into which the memory card 9 is attached, a secure unit 11, and SIM card external terminals C1 to C8. These SIM card external terminals C1 to C8 are standardized by ISO7816. In ISO7816, in addition to standard IC card terminals (C1 to C5 and C7), USB terminals (C4 and C8) are provided. Assigned.

  When the SIM card adapter 10 communicates with the host unit 8, communication is performed via these SIM card external terminals C1 to C8. The secure unit 11 communicates with the memory card 9 via the memory card connector.

  In this case, the communication between the secure unit 11 and the memory card 9 is, for example, a memory stick (registered trademark), an SD (Secure Digital) card (registered trademark), a multimedia card (MMC: MultiMedia Card) (registered trademark), or the like. An interface is used.

  Next, data backup processing of the wireless communication system 1 in the present embodiment will be described using the flowchart of FIG.

  FIG. 3 shows processing when the mirror data in the base station server 5 is synchronously updated with the data update of the memory card 9.

  First, the host unit 8 performs card authentication of the memory card 9 (step S101). If the card authentication is OK, the subsequent communication is set to the encrypted communication state (step S102). If the card authentication cannot be performed in the process of step S101, the process is interrupted.

  Subsequently, the host unit 8 transmits update data (addition, change, deletion, etc.) of the memory card 9 by security communication (step S103), and updates the data of the memory card 9.

  When the data update is completed (step S104), the host unit 8 outputs a request to mirror update the memory card 9 data to the base station server 5. The host unit 8 performs server authentication (step S105), and when authenticated (step S106), access to the card data area in the base station server 5 assigned to the memory card 9 mounted on the SIM card 6 is performed. Request permission. Further, if the server authentication is not performed in the process of step S105, the process is interrupted.

  When access is permitted, the card data is transmitted to the base station server 5 via the host unit 8, and the mirror update of the card data is performed (step S107). Thereafter, when the mirror update of the card data is completed, the base station server 5 returns an end confirmation to the host unit 8 (step S108), and the data backup process is ended.

  For the communication between the host unit 8 and the base station server 5, for example, a communication procedure by secure communication such as SSL (Secure Socket Layer) is used, and communication interception can be prevented. In communication between the host unit 8 and the base station server 5, data is divided in units of packets.

  When a communication error occurs between the host unit 8 and the base station server 5, the card data update processing to the base station server 5 may be extended until communication is possible. At this time, the temporary storage data of the update data may be stored in a memory area provided in the host unit 8 to guarantee against physical damage of the card until the communication is restored.

  FIG. 4 is an explanatory diagram showing a data communication path of the wireless communication system 1 in the data backup process of FIG.

  First, the data path in the SIM card 6 via the secure unit 11 will be described. This data path is shown as path 1 in FIG.

  First, at the time of authentication of the memory card 9 (FIG. 3, step S101 processing), the host unit 8 communicates with the memory card 9 via the secure unit 11 of the SIM card adapter 10 to perform card authentication. In this case, the security register SR of the controller 9b is used for secure communication.

  Subsequently, in the data update of the memory card 9 (FIG. 3, step S103), the host unit 8 writes the update data to an arbitrary area of the memory card 9 via the secure unit 11.

  A data path when the SIM card 6 and the host unit 8 communicate without going through the secure unit 11 is indicated by a path 2 in FIG.

  In this case, in the authentication of the memory card 9 (FIG. 3, step S101), the host unit 8 directly performs card authentication with the controller 9b in the memory card 9 via the card interface 8g.

  In the data update of the memory card 9 (FIG. 3, step S103), the host unit 8 writes the update data directly to the memory card 9 via the card interface 8g.

  Next, a data path between the host unit 8 and the base station server 5 will be described. This route is indicated by route 3 in FIG.

  In this case, in the server authentication (the process of FIG. 3, step S105), the host unit 8 transmits a request for server authentication from the RF processing unit 7 via the antenna provided in the mobile phone 2, and the request is received. After being demodulated by the plurality of base stations 3 and aggregated in the wireless network control device 4, the base stations are sent to the base station server 5.

  In the base station server 5, the server control device 5a compares the card data corresponding to the device authentication memory card stored in the hard disk device 5b to perform card authentication.

  In the mirror update of card data (FIG. 3, step S107 processing), the host unit 8 divides the card data into packets, and the base station passes through the RF communication unit 7, the base station 3, and the radio network controller 4 respectively. The data is sent to the server 5 and the card data corresponding to the device authentication memory card is updated.

  Next, processing for restoring in another memory card 9 when the memory card 9 in use becomes unusable due to a failure or the like will be described with reference to the flowchart of FIG.

  In this case, the new memory card 9 may be a blank card or an existing memory card with a different ID.

  First, the host unit 8 performs card authentication of the memory card 9 (step S201). At this time, since the card ID of the memory card used until now is stored in the SIM card 6, the card ID of the new memory card 9 does not match.

  Thereby, the host unit 8 recognizes that the new memory card 9 has been inserted into the SIM card adapter 10 (step S202), and performs card authentication of the new memory card 9 (steps S203 and S204). As a result, the host unit 8 determines that restoration processing (restoration) of the new memory card 9 is necessary.

  Subsequently, the host unit 8 performs server authentication (step S205), and when authenticated, establishes secure communication between the host unit 8 and the base station server 5 (step S206). Thereafter, the host unit 8 outputs a request to restore the restore data corresponding to the card ID that was backed up to the base station server 5, and the restore data is transmitted from the base station server 5 via secure communication. (Step S207).

  The host unit 8 performs a process of writing the transmitted restore data to the new memory card 9 in parallel (step S208), and performs the restore process.

  When the restoration data transmission is completed, the normal termination with the base station server 5 is confirmed (step S209). Subsequently, when the restoration data writing process is completed, the normal termination with the memory card 9 is confirmed (step S210).

  In these processes of steps S209 and S210, if the process does not end normally, retry or abnormal end process is performed. Further, in the event of a network error, this processing may be postponed until communication is resumed.

  FIG. 6 is an explanatory diagram showing a data communication path of the wireless communication system 1 in the restore process of FIG.

  First, a data path in the SIM card 6 via the secure unit 11 in the restore process will be described. This data path is indicated by path 4 in FIG.

  First, in the authentication of the memory card 9 (FIG. 5, step S201), the host unit 8 communicates with the memory card 9 via the secure unit 11 from the card interface 8g to perform card authentication. Here, the security register SR of the controller 9b is used for secure communication.

  Then, in the restore data update process of the memory card 9 (the process of FIG. 5, step S208), the host unit 8 writes the update data to the memory 9a from the card interface 8g via the secure unit 11.

  In addition, a data path when the SIM card 6 and the host unit 8 communicate without passing through the secure unit 11 is indicated by a path 5 in FIG.

  In this case, in the authentication of the memory card 9 (FIG. 5, step S201 processing), the host unit 8 performs card authentication with the controller 9b of the memory card 9 through the card interface 8g (USB interface or memory card interface).

  In the restoration data update process of the memory card 9 (the process of FIG. 5, step S208), the host unit 8 writes the update data to the memory card 9 through the card interface 8g.

  Next, a data path between the host unit 8 and the base station server 5 will be described. This route is indicated by route 6 in FIG.

  In this case, in the server authentication (the process of FIG. 5, step S205), the host unit 8 transmits a server authentication request from the RF processing unit 7 via the antenna provided in the mobile phone 2, and receives this request. After being demodulated by the plurality of base stations 3 and aggregated by the radio network controller 4, they are sent to the base station server 5.

  The server control device 5a compares the card data corresponding to the device authentication memory card stored in the hard disk device, and performs card authentication.

  When transmitting the encrypted restore data (the process of step S207 in FIG. 5), the base station server 5 divides the restore data into packets and performs RF communication via the radio network controller 4 and the base station 3. The data corresponding to the memory card 9 is restored.

  FIG. 7 is an explanatory diagram showing an example when new data rewritten to the memory card 9 is stored in the hard disk device 5 b of the base station server 5.

  In FIG. 7, the right side shows the storage area of the memory card 9, and the left side shows the storage area of the hard disk device 5b.

  In the hard disk device 5b, a storage area corresponding to each memory card 9 is individually assigned. For example, when the file A is rewritten in the storage area of the memory card 9, the same contents as the latest file A are stored. Data is written in the allocated storage area of the hard disk device 5b as the latest file A0.

  Thereby, complete data backup of the memory card 9 becomes possible. 7 describes the case of one file, the same processing is performed even when there are a plurality of files stored in the memory card 9.

  Furthermore, the base station server 5 can also manage the history of files stored in the memory card 9. FIG. 8 is an explanatory diagram showing a history management example of up to n (arbitrary) files in the base station server 5.

  When managing up to n file histories, for example, when the file A in the memory card 9 is rewritten, the latest file A is written in the hard disk device 5b of the base station server 5 as the latest file A0 as shown in the figure. .

  The latest file A0 before being written on the log management file is changed to file A1, and the file A1 is changed to file A2, the file A2 is changed to file A3, and the file An-1 is changed to file An. The oldest file An that existed before the latest file A1 was written is discarded.

  As a result, complete backup of the file A in the memory card 9 becomes possible, and the base station server 5 can manage the history for n times. Therefore, by referring to the history management file, it is possible to freely return to the old file Ak corresponding to any history k below the history n. Here, the history management of one file has been described, but the same file management is also performed for a plurality of files stored in the memory card 9.

  Thus, according to the first embodiment, even if the memory card 9 is broken due to physical destruction or the like, loss of data stored in the memory card 9 can be prevented, and the reliability of the SIM card 6 can be prevented. Can greatly improve the performance.

(Embodiment 2)
FIG. 9 is an explanatory diagram showing a configuration example in the radio communication system according to the second embodiment of the present invention, and FIG. 10 shows an example of communication line path switching processing by a mobile phone provided in the radio communication system of FIG. 11 is a flowchart showing an example of detailed processing in step S302 of FIG. 10, FIG. 12 is a flowchart showing another example of detailed processing in step S302 of FIG. 10, and FIG. 9 is an explanatory diagram showing a data communication path in the wireless communication system of FIG. 9, FIG. 14 is an explanatory diagram showing an example of data backup by the wireless communication system of FIG. 9, and FIG. 15 is a base station by the wireless communication system of FIG. It is explanatory drawing which shows the example of log | history management of the file of a server.

  In the second embodiment, the wireless communication system 1 has the same configuration as that of the first embodiment, which includes a mobile phone 2, a base station 3, a wireless network control device 4, and a base station server 5, as shown in FIG. In addition, an Internet connection device 12 and a network provider server 13 are newly added.

  The internet connection device 12 includes, for example, a personal computer, a set top box, and the like, and performs internet connection via the network provider server 13.

  The network provider server 13 is a server that provides various data and services such as music data and video data. The network provider server 13 and the wireless network control device 4 are connected to the Internet line net via, for example, a WAN (Wide Area Network).

  The mobile phone 2 includes a SIM card 6, an RF communication unit 7, and a host unit 8 as in the first embodiment. The difference from the first embodiment is that a short-range RF communication unit 14 and an external interface 8h are newly provided.

  The short-distance RF communication unit 14 performs wireless communication with the Internet connection apparatus 12 by WiFi (Wireless Fidelity), wireless LAN (Local Area Network), NFC (Near Field Communication), wireless USB, or the like.

  The external interface 8h is provided in the host unit 8, and serves as an interface (Ethernet (registered trademark), USB, etc.) between the processor unit 8a and the Internet connection device 12.

  In this case, the mobile phone 2 can be switched to another communication line path such as a wired LAN or a wireless LAN in addition to the wireless communication of the mobile phone 2.

  In addition, the mobile phone 2 may perform the above-described communication by using a mobile phone cradle or the like to make a wired connection or a wireless connection. Processing can also be performed when external power is supplied by the cradle.

  FIG. 10 is a flowchart showing an example of a communication line path switching process by the mobile phone 2.

  First, the processor unit 8a determines whether to switch the communication line path automatically or manually (step S301). This determination is made based on setting data (automatic or manual) set in advance by the user. The setting data includes, for example, selection of whether the communication line route is automatically or manually switched, and the communication line route priority order for setting the priority of the communication line route when the communication line route is automatically switched. Contains data.

  As will be described later, the communication line route priority data includes, for example, speed priority data for determining communication line route priority by giving priority to communication speed, and communication line route priority given to communication cost over communication speed. There is cost priority data that determines priority.

  When the processor unit 8a determines that the automatic setting is performed, the processor unit 8a reads out the communication line route priority data stored in the memory 8b, for example, and according to the priority set in the communication line route priority data. The selected communication line route is selected (step S302). On the other hand, when the processor unit 8a determines that the setting is manual, the communication line path is set by the user, for example (step S303).

  FIG. 11 is a flowchart showing a detailed processing example in step S302 of FIG. FIG. 11 illustrates the communication line path determination process when speed priority data is set. Here, for example, the line speed of the wired LAN is the fastest, followed by WiFi, and the line speed at which the mobile phone 2 performs wireless communication is the slowest.

  First, the processor unit 8a determines whether or not a wired LAN having the fastest line speed is available (step S401), and if available, selects a line route so as to perform communication using the wired LAN (step S401). S402).

  If the wired LAN is not usable in the process of step S401, it is determined whether or not WiFi with the next highest line speed is available after the wired LAN (step S403). A line route is selected so as to perform communication (step S404).

  In the process of step S403, if WiFi is not available, it is determined whether or not wireless communication by the mobile phone 2 having the slowest line speed is available (step S405). A line route is selected so as to perform communication by wireless communication of the telephone 2 (step S406). In the process of step S405, when the wireless communication of the mobile phone 2 is not available, the process is terminated.

  FIG. 12 is a flowchart showing a detailed processing example in the processing of step S302 of FIG. 10, and this figure explains the communication line path determination processing when cost wired data is set. Here, for example, the cost of wireless communication is assumed to be lower in the order of wired LAN, WiFi, and then the mobile phone 2.

  First, the processor unit 8a determines whether or not a wired LAN with the lowest communication cost can be used (step S501). If the wired LAN can be used, the processor unit 8a selects a line path so as to perform communication using the wired LAN (step S501). S502).

  If the wired LAN cannot be used in the process of step S501, it is determined whether or not WiFi with the next lowest communication cost can be used after the wired LAN (step S503). A line route is selected so as to perform communication by WiFi (step S504).

  Further, in the process of step S503, if WiFi is not available, it is determined whether or not wireless communication by the mobile phone 2 with the highest communication cost is available (step S505). A line route is selected so as to perform communication by the wireless communication of the telephone 2 (step S506). In the process of step S505, if the wireless communication of the mobile phone 2 is not available, the process is terminated.

  As described above, the communication speed and the communication cost are shown as low as described above. However, the determination may be made based on other conditions such as communication accuracy.

  FIG. 13 is an explanatory diagram showing a data communication path in the wireless communication system 1 according to the second embodiment.

  In FIG. 13, the data path in the SIM card 6 via the secure unit 11 is indicated by a path 7, the data path between the host unit 8 and the base station server 5 is indicated by a path 8, and WiFi, wireless LAN, NFC, or A data path between the host unit 8 and the base station server 5 via the wireless USB is indicated by a path 9, and a data path between the host unit 8 and the base station server 5 via the wired LAN or USB is indicated by a path 10. Yes.

  In this case, the route 7 is the same as the route 1 (FIG. 4) of the first embodiment, and the route 8 is the same as the route 3 (FIG. 4) of the first embodiment.

  In the path 9, the Internet connection device 12 and the short-range RF communication unit 14 perform wireless communication from the base station server 5 through the Internet line net and the network provider server 13 to access the host unit 8. It becomes a route.

  In the path 10, the Internet connection device 12 and the external interface 8 h perform wired communication from the base station server 5 through the Internet line net and the network provider server 13 to access the host unit 8.

  In the wireless communication system 1 according to the second embodiment, for example, only important data such as registration information such as IMSI numbers and mobile phone numbers, and telephone directory data is backed up to the base station server 5, and music data, video Various multimedia contents such as data may be backed up to the network provider server 13.

  FIG. 14 is an explanatory diagram showing an example when important data among new data rewritten to the memory card 9 is backed up to the base station server 5 and data such as multimedia contents is backed up to the network provider server 13. is there.

  In FIG. 14, the storage area of the memory card 9, the storage area of the hard disk device 5 b of the base station server 5, and the storage area of the network provider server 13 are shown from left to right.

  The memory card 9 stores important data such as registration information such as IMSI numbers and mobile phone numbers and phone book data as file A, and other data such as other multimedia contents is stored as file B. Has been.

  The same data as the file A in the memory card 9 is stored as the file A0 in the hard disk device 5b, and the data in the file B is stored as the file B0 in the network provider server 13.

  Further, the hard disk device 5b has a link management file indicating the link destination of the file B0, and the base station server 5 manages the file B0 stored in the network provider server 13 by the link management file.

  FIG. 15 is an explanatory diagram showing a history management example of up to n (arbitrary) files in the base station server 5. In this case, history management is performed by the same processing as in FIG. 8 of the first embodiment.

  Similarly, the history management of the file B made up of data such as multimedia contents can be performed. At this time, the history management processing similar to that shown in FIG. 8 may be performed by the network provider server 13.

  Thereby, in the second embodiment, in addition to the wireless communication of the mobile phone 2, it becomes possible to support a plurality of communication paths such as a wired LAN and a wireless LAN, and to improve the data communication speed, the communication quality, and the capability. Can do.

  Further, by connecting to the network provider server 13, data (for example, music data, moving image data, service, etc.) in the network provider server 13 other than the base station server 5 can be provided to the mobile phone 2.

  Furthermore, by supporting a wired LAN or Internet line net, for example, the Internet connection device 12 can perform high-speed processing of synchronization between the memory card 9 and the base station server 5.

(Embodiment 3)
FIG. 16 is a flowchart showing an example of processing for restricting access to a memory card according to the third embodiment of the present invention. FIG. 17 is an explanatory diagram showing an example of a chip layout of the memory card according to the third embodiment of the present invention. FIG. 18 is a block diagram illustrating a configuration example of the controller of FIG.

  In the third embodiment, a technique for prohibiting use of data in the memory card 9 in the configuration of the wireless communication system 1 (FIG. 9) of the second embodiment will be described.

  For example, when the mobile phone 2 is lost, in order to prohibit the use of the data in the memory card 9, the base station server 5 is accessed from another phone, a personal computer, an Internet terminal, or the like, and each SIM card 6 is accessed. The corresponding access management file is changed to prohibit access or restrict access to the memory card 9 or the secure unit 11.

  Access prohibition / access restriction is performed by executing a management file change from an accessible path among a plurality of paths (mobile phone wireless communication, WiFi, wireless LAN, NFC, wireless USB, wired LAN, USB, etc.). Implement quick lock / unlock.

  The access management file of the SIM card 6 is managed in the base station server 5 in correspondence with the access management file. The unlocking method is the same as the locking method, and access permission is performed by updating the access management file.

  For example, when the access permission of the access management file is prohibited, unlocking is impossible.

  FIG. 16 is a flowchart showing an example of processing when the access restriction of the memory card 9 is performed from another telephone, a personal computer, an Internet terminal, or the like.

  First, the processor unit 8a determines whether the communication line of the mobile phone 2 is online or offline (step S601). When the communication line is offline, the processor unit 8a requests input of a PIN (Personal Identity Number) code when the mobile phone 2 is activated (step S602), and confirms the security when offline. To do.

  When the PIN code is input in response to the PIN code input request, the processor unit 8a determines whether or not the input PIN code is correct (step S603), and if the input PIN code is correct According to the access management file stored in the SIM card 6, file access is enabled (step S604). Thereafter, when an arbitrary set time has elapsed (step S605), the processor unit 8a returns to the process of step S601 again.

  If the input PIN code is not correct in the process of step S603, the processor unit 8a determines the number of retries (number of PIN code inputs) (step S606), and if the number of retries is equal to or less than a specified value, The process returns to step S602 again.

  If it is determined in step S605 that the number of retries has exceeded the specified value, the processor unit 8a prohibits file access to the memory card 9 (step S607).

  If it is determined in step S601 that the communication line is online, the processor unit 8a compares the access management files between the base station server 5 and the SIM card 6, and if they are different, the latest access management is performed. Update processing is performed on the contents of the file (step S607).

  Subsequently, the processor unit 8a determines whether or not an access restriction is set for the access management file (step S609). If no access restriction is set for the access management file, the processor part 8a restricts the file access. Not performed (step S610).

  Thereafter, when an arbitrary set time has elapsed (step S611), the processor unit 8a returns to the process of step S601 again. Further, the processing from step S601 is performed not only in the processing in steps S611 and S605, but also when there is an urgent interrupt request from the carrier side. Note that an urgent interrupt request is a case in which it is desired to immediately restrict access due to loss of the mobile phone 2 or the like.

  In the process of step S609, when access restriction is set for the access management file, the processor unit 8a performs file access restriction on the memory card 9 (step S612).

  Next, a data restoration technique using a unique ID number assigned to the memory card 9 will be described.

  When data is restored due to data loss due to physical destruction of the memory card 9, the unique ID number assigned to the memory card 9 is used to ensure the security of the data restoration procedure by data identification and authentication. It is possible to use it.

  FIG. 17 is an explanatory diagram showing an example of the chip layout of the memory card 9.

  As shown in the figure, the memory card 9 has a semiconductor chip 15a to be a memory 9a mounted on the main surface of a card wiring board 15, and a semiconductor chip 16 to be a controller 9b is stacked on the semiconductor chip 15a. It becomes the composition.

  On the chip mounting surface of the card wiring substrate 15, a plurality of bonding electrodes are formed in the vicinity of the peripheral portions of the two opposing sides of the semiconductor chip 15a. In addition, a plurality of chip electrodes are provided in the peripheral portions of the two opposing sides of the semiconductor chip 15a, and these chip electrodes and substrate electrodes are connected to each other through bonding wires 17.

  Further, on the chip mounting surface of the card wiring substrate 15, a plurality of bonding electrodes are also formed in the vicinity of the peripheral portions of two adjacent sides of the semiconductor chip 16, and these bonding electrodes are connected to the two adjacent sides of the semiconductor chip 16. The plurality of chip electrodes formed in the peripheral portion are connected to each other through bonding wires 18.

  Further, the layout is so formed that an ID control storage section 16a is formed on the upper part of the semiconductor chip 16 of FIG. The ID control storage unit 16a is provided with a read interface terminal P1 (FIG. 18) and an external power supply terminal P2 (FIG. 18).

  The ID control storage unit 16a is connected to the substrate electrode of the card wiring board 15 through the bonding wire 19 from the read interface terminal P1 and the external power supply terminal P2, and through the controller 9b. Without being able to communicate directly with the secure unit 11.

  The ID control storage unit 16a stores the ID number of the memory card 9, and is used for authentication when data is backed up to the base station server 5 or restored. Since this ID number is data of a small capacity (for example, about several bytes to several tens of bytes), the chip area occupied on the semiconductor chip 16 is small, and mechanical stress such as bending or twisting is applied to the memory card 9. Even in this case, the possibility of destruction can be minimized regardless of the presence or absence of communication.

  FIG. 18 is a block diagram illustrating a configuration example of the controller 9b provided with the ID control storage unit 16a.

  The controller 9b includes a power-on reset 20, a clock generation unit 21, a memory interface 22, a host interface 23, a CPU 24, a buffer 25, and an ID control storage unit 16a.

  The power-on reset 20 controls the power supply system such as reset processing of the controller 9b. The clock generation unit 21 generates a clock signal and supplies it to the CPU 24 and the like. The memory interface 22 is an interface with the memory 9 a, and the host interface 23 is an interface with the host unit 8.

  The CPU 24 controls all of the controller 9b. The buffer 25 temporarily stores transfer data during data transfer. The ID control storage unit 16a operates alone when the controller 9b becomes defective due to destruction or the like, and enables reading of the ID number and the like of the memory card 9.

  The ID control storage unit 16 a includes a power supply switching circuit 26 and an ID storage unit 27. The power switching circuit 26 includes a power corresponding circuit 28 and a switch unit 29. The ID storage unit 27 includes an interface 30, a memory unit 31, and a secure unit 32.

  The power supply corresponding circuit 28 monitors the power supply voltage VCC supplied to the controller 9b. When the power supply voltage VCC is not supplied due to a short circuit or the like due to a failure or destruction of the controller 9b, a switching control signal is sent to the switch unit 29. In addition to outputting, the wiring line of the power supply voltage VCC is separated.

  An external power supply terminal P2 is connected to the ID storage unit 27. When the power supply corresponding circuit 28 separates the wiring line of the power supply voltage VCC, the power supply voltage VCC2 is externally supplied via the external power supply terminal P2. The ID storage unit 27 is supplied and can be operated independently.

  The switch unit 29 has one connection unit connected to the CPU 24 and the other connection unit connected to the interface 30. The switch unit 29 receives the switching control signal output from the power supply corresponding circuit 28 and disconnects the CPU 24 and the interface 30.

  The interface 30 is an interface with the CPU 24. The interface 30 is connected to a read interface terminal P1 used when reading the ID number from the outside.

  Reading through the read interface terminal P1 includes, for example, 1-bit serial communication. As a result, the number of external terminals can be reduced, and connection problems and the like can be reduced. Alternatively, non-contact communication or the like may be used.

  The memory unit 31 stores an ID number in the memory card 9. The secure unit 32 is a secure section that performs authentication and encryption when an ID number is read through the interface 30.

  As described above, by providing the controller 9b with the ID control storage unit 16a that operates independently, there is a possibility that the ID number of the memory card 9 for data restoration can be read even if the controller 9b becomes defective. Can be improved.

  As a result, in the third embodiment, since it is possible to immediately limit access to the memory card 9 from another telephone, a personal computer, an Internet terminal, or the like, data protection of the memory card 9 can be more reliably performed. Can be done.

  In addition, since the ID number in the memory card 9 can be read with a higher probability, restoration work such as data restoration can be performed more efficiently.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

  For example, the wireless communication system of the present invention may be configured by combining at least two of the first to third embodiments or by partially combining each of the embodiments.

  The present invention is suitable for a technique for preventing loss of stored data due to physical destruction in a secure memory card such as a SIM card.

It is explanatory drawing which shows the structural example of the radio | wireless communications system by Embodiment 1 of this invention. FIG. 2 is a block diagram illustrating a configuration example of a memory card and a SIM card adapter provided in a SIM card in the wireless communication system of FIG. 1. 3 is a flowchart illustrating an example of data backup processing in the wireless communication system of FIG. 1. It is explanatory drawing which showed the communication path | route of the data of the radio | wireless communications system in the data backup process of FIG. 3 is a flowchart showing data restoration processing in the wireless communication system of FIG. 1. FIG. 6 is an explanatory diagram showing a data communication path of the wireless communication system in the restore process of FIG. 5. It is explanatory drawing which shows an example at the time of preserve | saving to the base station server the new data rewritten by the memory card in the radio | wireless communications system of FIG. It is explanatory drawing which shows the file history management example of the base station server in the radio | wireless communications system of FIG. It is explanatory drawing which shows the structural example in the radio | wireless communications system by Embodiment 2 of this invention. 10 is a flowchart illustrating an example of a communication line path switching process by a mobile phone provided in the wireless communication system of FIG. 9. It is the flowchart which showed an example of the detailed process in the process of step S302 of FIG. It is the flowchart which showed the other example of the detailed process in the process of step S302 of FIG. It is explanatory drawing which showed the communication path | route of the data in the radio | wireless communications system of FIG. It is explanatory drawing which shows an example of the data backup by the radio | wireless communications system of FIG. It is explanatory drawing which shows the example of log | history management of the file of the base station server by the radio | wireless communications system of FIG. It is a flowchart which shows the process example at the time of performing the access restriction of the memory card by Embodiment 3 of this invention. It is explanatory drawing which shows an example of the chip layout of the memory card by Embodiment 3 of this invention. It is a block diagram which shows the structural example of the controller of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wireless communication system 2 Mobile phone 3 Base station 4 Wireless network control device 5 Base station server 5a Server control device 5b Hard disk device 6 SIM card 7 RF communication part 8 Host part 8a Processor part 8b Memory 8c Input part 8d Output part 8e Display part 8f Power supply circuit unit 8g Card interface 8h External interface 9 Memory card 9a Memory 9b Controller 10 SIM card adapter 11 Secure unit 12 Internet connection device 13 Network provider server 14 Short-range RF communication unit 15 Card wiring board 15a Semiconductor chip 16 Semiconductor chip 16a ID Control storage unit 17 Bonding wire 18 Bonding wire 19 Bonding wire 20 Power-on reset 21 Clock generation unit 22 Memory interface 23 E Strike interface 24 CPU
25 buffer 26 power supply switching circuit 27 ID storage unit 28 power supply corresponding circuit 29 switch unit 30 interface 31 memory unit 32 secure unit C1 to C8 SIM card external terminal net Internet line P1 read interface terminal P2 external power supply terminal

Claims (26)

A SIM card in which data including data for determining whether or not to use wireless communication is stored, a high-frequency power amplifier that outputs a high-frequency signal for wireless communication, and an RF communication unit that processes a signal received by wireless communication; and A mobile communication terminal for performing wireless communication, comprising the SIM card, a host unit for controlling the RF communication unit;
A plurality of base stations that receive radio waves from the mobile terminal or transmit radio waves to the mobile communication terminal and secure radio communication lines with the mobile communication terminal in communication;
A wireless network control unit that performs integrated control by collecting radio waves transmitted and received by the base station;
In response to a request from the mobile communication terminal, a mirror station update of data stored in the SIM card, and a base station server that performs restoration,
The base station server
A data storage unit that mirror-updates data stored in each of the SIM cards, and when the SIM card data is newly stored or updated, the data of the SIM card is mirror-updated in the data storage unit A wireless communication system. The wireless communication system according to claim 1, wherein
The wireless communication system, wherein the data stored in the SIM card includes user data uniquely stored in the SIM card by a mobile communication terminal user. The wireless communication system according to claim 1 or 2,
The SIM card is
A memory card for storing data stored in the SIM card;
A wireless communication system comprising a secure part for performing secure communication and comprising a SIM card adapter to which the memory card is attached. The wireless communication system according to claim 3,
The memory card is
A nonvolatile semiconductor memory for storing data;
A controller for controlling the operation of the nonvolatile semiconductor memory,
The controller is
An external power supply terminal to which an external power supply voltage is supplied and a read interface terminal used when reading the ID number from the outside are connected to each other, and the external power supply terminal when the controller becomes inoperable And an ID control storage unit that operates independently from the controller by supplying a power supply voltage through the interface and can read out the ID number of the memory card through a read interface terminal. A wireless communication system. The wireless communication system according to claim 4, wherein
The ID control storage unit
A power supply circuit that monitors the power supply voltage supplied to the controller and separates the power supply voltage wiring line when the power supply voltage is not supplied;
An ID storage unit for storing an ID number of the memory card;
A wireless communication system, comprising: a secure unit that performs secure communication when an ID number stored in the ID storage unit is read. In the radio | wireless communications system of any one of Claims 1-5,
The host unit is
When data is stored in the SIM card, an update request for requesting mirror update of data is requested to the base station server, and data to be mirror updated is transmitted to the base station server,
The base station server
A wireless communication system, wherein when there is a request from the host unit, the data transmitted from the host unit is mirror updated in the data storage unit. The radio communication system according to any one of claims 2 to 6,
The host unit is
When a new memory card is mounted, it is determined that the restoration process of the memory card is necessary, a restore request for requesting data restoration of the memory card used is requested to the base station server, Mirror update data transmitted from the base station server is stored in the new memory card,
The base station server
A wireless communication system, wherein when there is a request from the host unit, mirror update data of the corresponding memory card stored in the data storage unit is transmitted to the host unit. In the radio | wireless communications system of any one of Claims 2-7,
The base station server
Each time the file data in the memory card is rewritten, the latest rewritten file data is mirror updated in the data storage unit. The radio communication system according to any one of claims 2 to 6,
The base station server
Every time the file data of the memory card is rewritten, the history management file for managing the history of file data update is updated, and the file data from the latest file to any number of files is mirror updated in the data storage unit. A wireless communication system. In the radio | wireless communications system of any one of Claims 1-9,
A network provider server that provides various data and services such as music data and video data;
An internet connection device connected to the network provider server and performing internet connection via an internet line;
The mobile communication terminal is
A short-range RF communication unit that performs wireless communication with the Internet connection device;
An external interface for performing wired communication with the Internet connection device,
The host unit is
When performing data mirror update or data restoration, the communication path to the base station server is wireless communication by the RF communication unit, wireless communication by the short-range RF communication unit, or wired communication by the external interface. A wireless communication system, wherein one of the two is selected. The wireless communication system according to claim 10, wherein
The short-range RF communication unit is
Perform wireless communication with the Internet connection device by wireless LAN, NFC, wireless USB or the like,
The external interface is
A wireless communication system, wherein wired communication with the Internet connection device is performed by Ethernet or USB. The wireless communication system according to claim 9 or 10,
The host unit is
The communication circuit route that can be used is searched from the communication line route by the RF communication unit, the short-range RF communication unit, or the external interface, and communication under a preset condition is selected from the searched available communication circuit routes. A wireless communication system characterized in that a line route is used preferentially. The wireless communication system according to any one of claims 10 to 12,
The base station server
A wireless communication system, wherein only important data among mirror update data of the SIM card is stored in the data storage unit, and other data is stored in the network provider server. The wireless communication system according to any one of claims 1 to 13,
The host unit is
When there is an access restriction request for the SIM card via the wireless communication line, the setting data set with the access restriction stored in the data storage unit is fetched, and the SIM card is stored based on the setting data. A wireless communication system, wherein access restriction is implemented. A memory card comprising a nonvolatile semiconductor memory for storing data, and a controller for controlling the operation of the nonvolatile semiconductor memory;
A secure unit for performing secure communication, and a SIM card adapter for mounting the memory card;
The controller is
An external power supply terminal to which an external power supply voltage is supplied and a read interface terminal used when reading the ID number from the outside are connected to each other, and the external power supply terminal when the controller becomes inoperable And an ID control storage unit that operates independently from the controller by supplying a power supply voltage through the interface and can read out the ID number of the memory card through a read interface terminal. SIM card. The SIM card according to claim 15, wherein
The ID control storage unit
A power supply circuit that monitors the power supply voltage supplied to the controller and separates the power supply voltage wiring line when the power supply voltage is not supplied;
An ID storage unit for storing an ID number of the memory card;
A SIM card comprising: the secure unit that performs secure communication when an ID number stored in the ID storage unit is read. A SIM card storing data including data for determining whether wireless communication can be used, a high-frequency power amplifier that outputs a high-frequency signal for wireless communication, and an RF communication unit that processes a signal received by wireless communication; and A SIM card, and a host unit that controls the RF communication unit.
When data is stored in the SIM card, an update request for requesting mirror update of data is requested to a base station server connected via wireless communication, and data to be mirror updated is transmitted to the base station server. Thus, the SIM card data can be mirror updated in the base station server. The mobile communication terminal according to claim 17,
The host unit is
When a new memory card is mounted, it is determined that the restoration process of the memory card is necessary, a restore request for requesting data restoration of the memory card used is requested to the base station server, A mobile communication terminal, wherein mirror update data transmitted from a base station server is stored in the new memory card. The mobile communication terminal according to claim 17 or 18,
The mobile communication terminal characterized in that the data stored in the SIM card includes user data uniquely stored in the SIM card by a mobile communication terminal user. The mobile communication terminal according to any one of claims 17 to 19,
The mobile communication terminal is
A short-range RF communication unit that is connected to the network provider server and performs wireless communication with an Internet connection device that performs Internet connection via an Internet line;
An external interface for performing wired communication with the Internet connection device,
The host unit is
When performing data mirror update or data restoration, the communication path to the base station server is wireless communication by the RF communication unit, wireless communication by the short-range RF communication unit, or wired communication by the external interface. A mobile communication terminal characterized by selecting one of them. The mobile communication terminal according to claim 20,
The short-range RF communication unit is
Connect to the Internet via a wireless LAN, NFC, or wireless USB,
The external interface is
A mobile communication terminal characterized by connecting to the Internet via Ethernet or USB. The mobile communication terminal according to claim 20 or 21,
The host unit is
The communication circuit route that can be used is searched from the communication line route by the RF communication unit, the short-range RF communication unit, or the external interface, and the communication cost that is set in advance among the searched communication circuit routes is searched. A mobile communication terminal characterized by giving priority to the use of a cheap communication line route. The mobile communication terminal according to claim 20 or 21,
The host unit is
The communication circuit route that can be used is searched from the communication line route by the RF communication unit, the short-range RF communication unit, or the external interface, and the highest communication speed set in advance among the searched available communication circuit routes. A mobile communication terminal characterized by preferentially using a fast communication line route. The mobile communication terminal according to any one of claims 17 to 23,
The host unit is
When there is an access restriction request for the SIM card, the setting data set with the access restriction stored in the data storage unit is fetched, and the SIM card access restriction is performed based on the setting data. A characteristic mobile communication terminal. SIM card storing data including data for determining whether to use wireless communication, high-frequency power amplification for outputting a high-frequency signal for wireless communication, and RF communication unit for processing a signal received by wireless communication, and A mobile communication terminal that performs wireless communication including the SIM card and a host unit that controls the RF communication unit, and transmits radio waves from the mobile communication terminal, or transmits radio waves to the mobile communication terminal, A plurality of base stations that secure radio communication lines with the mobile communication terminal in communication, a radio network control unit that performs integrated control by collecting radio waves transmitted and received by the base station, and from the mobile communication terminal In response to a request, data from a wireless communication system including a base station server that performs mirror update and restoration of data stored in the SIM card. A guaranteed method,
When the data update of the SIM card is completed, wirelessly communicating with the base station server, the host unit requesting a mirror update of the update data stored in the SIM card;
The base station server mirror-updates data stored in the SIM card transmitted from the host unit in response to a request from the host unit to a data storage unit, and backs up the data stored in the SIM card A data guarantee method characterized by comprising: The data guarantee method according to claim 25,
The host unit performs card authentication when a memory card attached to the SIM card is inserted, and determines that restoration processing of the memory card is necessary when the card authentication of the memory card does not match. Requesting the base station server to transmit backed up data;
In response to the request, the base station server transmits the data to be restored backed up in the data storage unit;
The host section includes a step of writing the restore data transmitted from the base station server into the memory card.

Images